bank transfer checking script.

I need a script that will confirm any bank transfer payments made on my website. flow should act like this. [login to view URL] receives unique reference id from our website, then user makes bank transfer using id as reference. 2. user clicks "Payment Made", script begins to run. 3. script logs into our bank account via front end (no api). and locates [login to view URL] [login to view URL] checks .csv file for payment reference and amount. 5. if payment is confirmed website marks payment as "paid" on our website, and notifies customer "payment successful"